Endocrine Principles

Question 1

name the three hormones developed from tyrosine

Answer 1

Dopamine
NE and
Epi
and thyroid hormones

Question 2

describe the production process of peptide/protein hormones

Answer 2

mRNA from nucleus 
then to ribosomes to be translated
then to RER to be modified 
then into carrier vesicle to golgi
in golgi is folded and modified and packaged into excretory vesicles

Question 3

name the two thyroid hormones

Answer 3

T3

T4

Question 4

what is another name for T3

Answer 4

triiodothyoninr

Question 5

what is another name for T4?

Answer 5

tetraiodothronine

Question 6

what type of hormone do T3/T4 act as

Answer 6

steroid hormones

Question 7

describe the synthesis of steroid hormones

Answer 7

lipid droplet into cell and goes to mitochondria for P450 enzymes to work on then to SER and released

Question 8

do steroid or peptide hormones use the SER?

Answer 8

steroid

Question 9

do steroid or peptide hormones use RER in production?

Answer 9

peptide

Question 10

what type of hormones are free in blood?

Answer 10

amine and peptide

Question 11

what type of hormones are bound to proteins in blood?

Answer 11

steroids and thyroid hormones

Question 12

what is the rule about half life of hormones in blood?

Answer 12

stronger the binding of a carrier protein to a hormone, the slower the clearance and longer the hormone half life

Question 13

what are three changes seen in increased hormone levels

Answer 13

Target cell desensitization
Down regulation of receptors of another hormone at target cell
up regulation of receptors for another hormone at the target cell

Question 14

what is an example of increased hormone leading to upregulation of a receptor for a different hormone on the target cell?

Answer 14

hyperthyroidism leads to increased myocyte adrenergic receptors and can cause tachycardia